Entity
A guardian, arrow or rope.
Entity definition
One of the 128 8-byte blocks located at 40960 onwards. Each one defines the location and movement characteristics of a guardian, arrow or rope.
Entity specification
One of the eight pairs of bytes at the end of a room definition (e.g. at 53488). Each one specifies a guardian, arrow or rope present in the room.
Guardian
An inhabitant of a room that continuously moves left and right (horizontal guardian) or up and down (vertical guardian) in a straight line, or stays still. Contact with a guardian is fatal. The graphic data for all the guardians in the game can be found at 43776.
Nasty
An immobile object drawn in a single cell as part of a room along with the background, walls, floors, ramp and conveyor. Contact with a nasty is fatal. Some examples are: